In order to earn Ethereum, the main thing you should do is do trading activity here, and for that to happen, buy it if you have something to buy. Now, before you do it or decide to trade it, someone should know about trading. You should know how to use the indicators that are often used in the trading exchange.
The question is, do you have a broad understanding of cryptocurrency trading? If yes, that's better and also a good advantage, but if you don't have extensive knowledge of trading, you'll just ignore buying Ethereum.